The vulnerability posed little risk to most users.
The new malware program is an OS X version of a Windows backdoor called XSLCmd, researchers from FireEye said.
Apple last allowed public testing of a pre-release OS 14 years ago, but now it's letting OS X 10.10 out for an early spin.
Don't trust TrueCrypt anymore. Take a look at a few of the options available to you.
IOS users were kept vulnerable for three weeks to known security issues previously patched in Safari for OS X, a former Apple employee said.
Apple's Mail, FaceTime, Calendar, Safari browser and Software Update could be vulnerable, a researcher said.